The richest person involved in the sports world is Nike chairman Phil Knight at No. 24 and worth $16.3 billion. The richest American on Forbes' list is Bill Gates at $72 billion. He topped the list for the 20th straight year.

Others of note include: Rupert Murdoch ($13.4 billion), chairman and CEO of News Corp and 21st Century Fox; Michael Rubin ($2.3 billion), owner of Fanatics, one of largest online sports retailers in the U.S.; James France ($2 billion), vice chairman and executive vice president of NASCAR; and Under Armour founder and CEO Kevin Plank ($1.7 billion) and Frank and Lorenzo Fertitta ($1.3 billion, each), who co-own the UFC.

BASEBALL

WASHINGTON -- The Washington Nationals postponed their game with National League East rival Atlanta Braves Monday following a shooting earlier in the day that left at least 12 people dead at the nearby Washington Navy Yard.

Major League Baseball announced the game would be made up as a part of a split doubleheader on Tuesday with games at 1:05 p.m., and 7:05 p.m. The Braves conclude their last trip this season to Washington after a single game Wednesday.

"All of us here in the Nationals organization were deeply saddened to learn of the tragic events that occurred this morning only a few blocks from Nationals Park. Our thoughts and prayers go out to the victims and their families," the Nationals said in a statement that was released at 3:23 p.m. "In light of the circumstances, we have decided to postpone tonight's game against the Atlanta Braves.

Washington, D.C., Police Chief Cathy Lanier said about 2 p.m. that 12 people had been killed, including the shooter. She said two other suspects were being sought in connection with the incident. WTOP.com reported the shooter as Aaron Alexis, 34, from Texas, who may have gained access to the facility by using someone else's ID.

The Navy Yard and Nationals Park are on the north side of the Anacostia River and Nationals Park is on South Capitol Street, about two miles south of the U.S. Capitol. Some fans in the upper deck at Nationals Park can see the dome of the U.S. Capitol to the north.

COLLEGE BASKETBALL

Duke coach Mike Krzyzewski told ESPN.com that all players transferring to another school should either be forced to sit out a year or play immediately.

He believes it should be an all-or-nothing approach.

"Giving certain kids the right to play and others not the right to play, it should be done the same," Krzyzewski said. "If they want to let everybody play right away, then let everybody play right away. Everybody should be treated the same. I don't understand why there are exceptions to this rule."

Krzyzewski made the comment in light of the NCAA's apparent inconsistency about its transfer policy in which it allows some waivers.

Former Missouri guard Michael Dixon was allowed to play at Memphis immediately when he transferred after being accused of sexual assault. No charges were filed against Dixon.

However, former Louisville forward Rakeem Buckles was denied his appeal to play immediately at Minnesota. Buckles had to sit out a year after transferring to Florida International. He tore his ACL twice in three years at Louisville. When Florida International was banned from the postseason for having a low APR rating, Buckles followed coach Richard Pitino to Minnesota, where he appealed to play immediately.

Buckles was denied the appeal even though former Connecticut forward Alex Oriakhi was approved in his transfer to Missouri and FIU's Malik Smith to Minnesota.

Juan Pablo Montoya is returning to open-wheel racing next year to join Team Penske, it was announced Monday.

Montoya will drive the No. 2 car, the same one that AJ Allmendinger drove for part of this season.

Montoya will be teammates with Helio Castroneves and Will Power.

Montoya, a former Indianapolis 500 champion and Formula 1 driver, is leaving Earnhardt Ganassi Racing at the end of the season. He spent six years in Formula 1, where he won seven races. Ganassi owned the car Montoya drove when he won Indy 500 in 2000, his only IndyCar start.

Montoya has two NASCAR Sprint Cup Series wins, both at road courses. He won at Sonoma and Watkins Glen.

GOLF

A Long Island, N.Y., man is suing a Cancun golf resort for $2.25 million after he lost two fingers to a crocodile, the New York Post reported Monday.

Edward Lunger, 50, claims that there were no warning signs about crocodiles posted at the golf course. He was attacked by a crocodile while playing at Iberostar Cancun Golf Club in Mexico.

After Lunger chipped out of a sand bunker, he heard leaves rustle.

"All of a sudden, his arm went back, and his head went back," friend Mark Martin said. "I saw the crocodile leap up."

The female crocodile chomped down on Lunger's left arm up to his elbow, using its tail and claws to drag Lunger to the sand, according to the Post.

Martin used a large boulder to stop the crocodile.

Lunger said he paid nearly $18,000 at a private hospital in Cancun to operate on his hand.

After the golf resort claimed that Lunger incited the crocodile with chicken, Lunger decided to sue. He said Iberostar representatives initially began pressuring him to sign papers relieving the resort of any responsibility. When that failed, Lunger said it spread rumors that he prompted the attack by teasing the crocodile with chicken.